Ale brewed round there is light (8)
I believe the answer is:
ethereal
'is light' is the definition.
(I've seen this in another clue)
'ale brewed round there' is the wordplay.
'brewed' indicates an anagram.
'round' is an insertion indicator.
'ale' is an anagram of 'eal'.
'eal' going around 'there' is 'ETHEREAL'.
(Other definitions for ethereal that I've seen before include "Airy or supernatural" , "'Extremely delicate, almost not of this world (8)'" , "Delicate - airy" , "'Delicate, heavenly (8)'" , "Heavenly - fairy-like" .)